Write down the syntax of any three DML statements
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About DML Statements and Transactions
This chapter contains:
About Data Manipulation Language (DML) Statements
About Transaction Control Statements
Committing Transactions
Rolling Back Transactions
Setting Savepoints in Transactions
About Data Manipulation Language (DML) Statements
Data manipulation language (DML) statements access and manipulate data in existing tables.
In the SQL*Plus environment, you can enter a DML statement after the SQL> prompt.
In the SQL Developer environment, you can enter a DML statement in the Worksheet. Alternatively, you can use the SQL Developer Connections frame and tools to access and manipulate data.
To see the effect of a DML statement in SQL Developer, you might have to select the schema object type of the changed object in the Connections frame and then click the Refresh icon.
The effect of a DML statement is not permanent until you commit the transaction that includes it. A transaction is a sequence of SQL statements that Oracle Database treats as a unit (it can be a single DML statement). Until a transaction is committed, it can be rolled back (undone). For more information about transactions, see "About Transaction Control Statements".
This section contains:
About the INSERT Statement
About the UPDATE Statement
About the DELETE Statement